Setting Network Proxy in Docker in linux

Tushar Rao — Sun, 19 Feb 2023 10:07:37 +0000

Note: Combined all resources into one.
To run Docker in Ubuntu with a proxy, follow these steps:

Set the proxy in the Docker daemon by editing the Docker service file:

sudo systemctl edit docker.service

Then paste the following:

# A Systemd service definition to set proxy configuration for Docker engine on Linux

[Service]
Environment="HTTP_PROXY=http://proxy:proxy_port"
Environment="HTTPS_PROXY=http://proxy:proxy_port"
Environment="NO_PROXY=localhost,127.0.0.1"

If authentication is required, provide your laptop credentials:

[Service]
Environment="HTTP_PROXY=http://username:password@proxy:proxy_port"
Environment="HTTPS_PROXY=http://username:password@proxy:proxy_port"
Environment="NO_PROXY=localhost,127.0.0.1"

Set the proxy for Docker client to run and pull images:

sudo mkdir ~/.docker/
sudo nano ~/.docker/config.json

Then paste the following:

{
 "proxies":
 {
   "default":
   {
     "httpProxy": "http://proxy:proxy_port",
     "httpsProxy": "http://proxy:proxy_port",
     "ftpProxy": "http://proxy:proxy_port",
     "noProxy": "*.test.example.com,.example2.com,127.0.0.0/8"
   }
 }
}

If authentication is required, provide your laptop credentials:

{
 "proxies":
 {
   "default":
   {
     "httpProxy": "http://username:password@proxy:proxy_port",
     "httpsProxy": "http://username:password@proxy:proxy_port",
     "ftpProxy": "http://username:password@proxy:proxy_port",
     "noProxy": "*.test.example.com,.example2.com,127.0.0.0/8"
   }
 }
}

Set the proxy for Docker Compose:

Create a folder for configuring Docker service through systemd:

mkdir /etc/systemd/system/docker.service.d

Create a service configuration file at /etc/systemd/system/docker.service.d/http-proxy.conf, and paste the following:

[Service]
 # NO_PROXY is optional and can be removed if not needed
 # Change proxy_url to your proxy IP or FQDN and proxy_port to your proxy port
 # For Proxy server which require username and password authentication, just add the proper username and password to the URL. (see example below)

 # Example without authentication
 Environment="HTTP_PROXY=http://proxy_url:proxy_port" "NO_PROXY=localhost,127.0.0.0/8"

 # Example with authentication
 Environment="HTTP_PROXY=http://username:password@proxy_url:proxy_port" "NO_PROXY=localhost,127.0.0.0/8"

Reload systemctl so that the new settings are read:
```
sudo systemctl daemon-reload
```
Verify that the Docker service environment is properly set:
```
sudo systemctl show docker --property Environment
```
Restart the Docker service so that it uses the updated environment settings:
```
sudo systemctl restart docker
```

Another: To Set proxy in Dockerfile

To make the Docker images accessible to the proxy, you need to set the proxy in the Dockerfile that contains all the commands to be executed for the Docker images. You can do this by adding the following environment variables to the Dockerfile:

ENV http_proxy http://proxy:proxy_port
ENV https_proxy http://proxy:proxy_port

If the above doesn't work then you need to set authentication also, try below

ENV http_proxy http://username:password@proxy_url:proxy_port
ENV https_proxy http://username:password@proxy_url:proxy_port

Below is an example of how you can set up a proxy in a Dockerfile:

# First Stage
FROM python:3.8.7-slim-buster AS compile-image

ENV http_proxy http://proxy:proxy_port
ENV https_proxy http://proxy:proxy_port

RUN apt-get update \
    && apt-get install -y --no-install-recommends build-essential gcc

# Virtual environment
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

Setup Network Proxy in Ubuntu Terminal

Tushar Rao — Wed, 05 Oct 2022 11:28:55 +0000

Not able to update/install any package using apt-get in Debian/Ubuntu. Accessing network in terminal when internet is configured with a proxy is troublesome sometimes.

As you can see in the above image, it just keeps on connecting until the server is timed out.

Below is the easiest way to setup a proxy for your network to access internet in terminal with no hassle.

User need to set the proxy for apt-get. To set the proxy for apt-get, edit the file /etc/apt/apt.conf.

We use this acquire command to setup proxy for both http and https int the below format.



Acquire::http::Proxy "http://proxy:port";
Acquire::https::Proxy "https://proxy:port";
Acquire::ftp::Proxy "ftp://proxy:port";

Note: Sometimes your OS requries authentication before setting up proxy for the network. For that use the below format,



Acquire::http::Proxy "http://[username]:[password]@ [proxy-web-or-IP-address]:[port-number]";
Acquire::https::Proxy "http://[username]:[password]@ [proxy-web-or-IP-address]:[port-number]";

The username and password are your laptops/PC's login username and password.

Steps to follow:

To define proxy settings for apt, create or edit (if it already exists) a file named apt.conf in /etc/apt directory: ```

sudo nano /etc/apt/apt.conf


- Add the following lines to the file:
For eg,

Acquire::http::Proxy "http://127.0.0.1:8080";
Acquire::https::Proxy "http://127.0.0.1:8080";


> Note: Here, replace these proxy and port values from your network proxy.


- Save the file by pressing Ctrl + X and then hit Enter!

- Now Source the file to update the changes in terminal.

source /etc/apt/apt.conf


- That's it! Now try to run the below command.

sudo apt-get update


![Internet-working-in-Terminal](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/eglvxrdwfrc6tqjx5psv.jpeg)

Hope it helps you guys!. Thanks for supporting.
I have posted a video explanation on Youtube. Do check it out!

Forem: Tushar Rao

Setting Network Proxy in Docker in linux

Another: To Set proxy in Dockerfile

Setup Network Proxy in Ubuntu Terminal

Steps to follow: